Wood-turning machine.



No. 645,601. P'atented Mar. 20, 1900..

H. MAYERS.

WOOD TURNING MACHINE.

(Application filed Sept. 16, 1899.)

(No Model.) 3-Sheets t l.

a Illllllllllllllllll' No. 645,60l. Patented Mar. 20, I900. I H. MAYERS.

WOOD TURNING MACHINE.

(Application 81 d 5 pt. 16, 1899.)

(No Model.) 3 Sheets-Sheet 2.

i IIIIIIC l4 r- Avuen/or No. 645,60l. Paten ted Mar. 20, I900.

H. MAYEBS.

WOOD TURNING MACHINE.

(Application filed Sept. 16, 1899.) (No Model.) 3 Sheets-Sheet 3.

siren STATES PATENT Fries.

HENRY MAYERS, or Union CITY, *rnntivnssnn.

WOOD-TURNING IVIACHlhlE.

si rcrrrcArron forming part er Letters Patent No. 645,601, dated March26, 1906.

, Application filed $eptember 16,1899. fierial No. 730,731. (No model.)

To all whom it may concern.-

Be it known that I, HENRY MAYERs, a citi zen of the United States,residing at Union City, in the county of Obion and State of Tennessee,have invented certain new and useful Improvements in Wood-TurningMachines; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in wood-turningmachinery,especially to the chuck-head; audits object, among otherthings, is to provide a head of simple and durable constructionparticularly adapted to the shaping of chair rounds or stretchers andthe cutting of a radial groove or grooves therein when desired.

To these ends the invention consists in providing an ordinary chuck-headwith a lateral passage adapted to receive a knife or bit secured at itsouter end to one of two similar segments which are mounted upon springson opposite sides of the head, with which they revolve, forming at thesame time a bearing for. a clamp which may when desired compress saidsegments while revolving, and thereby cause the insertion of the bitinto'the socket of the chuck-head.

The invention also consists in the further novel constructions andcombinations of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, and in which-- Figure 1 is aperspective view of my improved chuck-head in position within a clamp.Fig. 2 is a central longitudinal section through the head. Fig. 3 isasection on line 00 as, Fig. 2. Fig. 4 is a section on line y y, Fig. 2.Fig. 5 is a detail view of a bit. Fig. 6 is a perspective view of aknife looking toward the inclined or cutting edge thereof. Fig. 7 is afront elevation of a second form of clamp. Fig. 8 is a longitudinalsection on line .2 2, Fig. 7. Fig. 9 is a view of a chair-round after ithas been cut longitudinally by the knife of the chuck, and Fig. 10 is asimilar view of a finished round produced by my chuck-head.

Referring to said figures by letters of reference, A is a mandrel drivenin any suitable manner, and B the chuck secured thereto, as

desired, preferably by inserting the threaded end of said mandrel into athreaded socket B, formed in the rear reduced portion of the chuck B.The enlarged front portion of the chuck B, within which is located thestock-receiving recess 'C,is provided with a lateral slot 0, adapted toreceive a knife D, bolted to said chuck in the usual manner andadjustable thereon. This knife is preferably of such construction as toproduce a round having a contour substantially such as shown in Fig. 9.Arranged, preferably, at right angles to said slot 0 is a second passageE,adapted to receive abit F, threaded at its outer end, as at F, andsecured by means of nuts f to the forwardlyprojecting arm G of a plateor casting G, and said arm is loosely bolted by means of bolts g to thechuck, as shown. The rear portion G of the casting, which partiallyincloses the rear end of the chuck,- is nearly semicircular incross-section and diminishes in size from its front to its rear edge. Asimilar casting H is loosely mounted upon the opposite side of the chuckwithout, however, having a bit secured thereto, and between each castingand the rear portion of the chuck is located a spring I, the ends ofwhich are seated in suitable recesses, whereby the castings G and H arenormally pressed away from the chuck, and thereby keep the end of thebit F outside of the recess C.

. In operating my device I employ a suitable clamp, as shown in Fig. 1,for forcing the castings G and H together while the chuck is revolvingwith the mandrel upon which it is mounted. In said figure the clamp isshown as formed of two cross-pieces J and J, each pivoted at one end toan upright and provided with semicircular recesses within which thechuck and its plates G and H may revolve. At one end of the lowercross-piece is secured a cord 3', which passes thence over a pulley j,mounted in the opposite end of the upper cross-piece J. This cord can beoperated by the hand or foot, and it is obvious that when pressure isexerted thereupon the cross-pieces will clamp the castings G and H,which will be forced together thereby and continue to revolve therein.

In Figs. 7 and '8 I have shown another form of clamp, which consists ofa ring K, having a tapered bore pivoted upon a yoke movement thereto andto the bitwhile re- K, which is mounted upon the end of a bar K This barmay be pivoted in the center and operated by means of a cord which willthrow the ring K forward over the castings G and H and compress them asdesired.

In operation the stock is fed to the chuck in any suitable manner,preferably by hand, i

and the knife D immediately gives the round the form shown in Fig. 9.Without stopping the motion of the chuck the clamp is applied thereto,forcing the castings G and II together and causing the bit F to biteinto the wood and form the desired radial groove therein, as shown inFig. 10. As soon as the pressure of the clamp is removed the springs I,assisted by the centrifugal force, will withdraw the bit and thefinished round may be removed.

It is obvious that more than one. radial. groove may be out upontheround, as two or more bits may be used, also, in lieu ofbolt-;ing-the plates or castings G and H to the; front, edge of chuck-headthey could be.

hinged thereto in any suitable manner.

A chair-round produced by thismachine possesses many advantages overtheordinary chair-round which is combined bone: dried. with a leg or postin a similarcondt. tion and glued thereto. It iswell, known,

that frequently the glue releases its hold,

causing the chairs to come apart andoften breaking some of its parts. Bymy construc tion it is merely necessary to force the grooved;

round intothe post. That portion ofthe walls of the recess which isadjacent to the groove will soon contract, filling the. groove.

and securely locking the two partstogether, forming practically onepiece. This construction, therefore, entirelyovercomes the, necessity ofusing glue in joining the rounds; and parts of chairs.

1 makeno claim to the round herein shown and described, as the sameforms. subject. matter for asecondapplication filed by meon December 2,1899, Serial No.;738,989.

Having thus fully described my invention, What I claim, and desire tosecure byLetters Patent, is-

1. In a device of thecharacter described, the combination, with achuck-head, of a .bearingplate are shaped in crosssection looselysecured to and partially embracing said head, a bit secured to the plateand projecting into a lateral passage in the chuckhead, and meansnormally mounted on and.

bearing upon said plate for imparting lateral volving, substantially asdescribed.

2. In a device of the character described,.

the combination, with a chuckThead, of a plate arc-shaped incrosssection pivoted, to, and. partially embracing, said head,,ataperedend v to said plate, a bit secured to the plate and projectinginto a lateral passage Within. the head, a spring intermediate saidplate and the head, and means mounted on and bearing upon the taperedportion of the plate for. comprojecting into a lateral passage withinthe head, a similar plate loosely secured to the opposite side of thechuck-head, springs intermediate the tapered ends of said plates and thehead, and means mounted upon said tapered ends for compressing theplates and forcing the bit inward during the operation of the chuck,substantially as described.

4:. In a device of the character described, the combination, with thechuck-head, of

plates loosely mounted thereon at opposite sides thereof and, adapted toinclose thehead, ,rear. end portions of said plates arc-shaped incross-section and embracing therear, end of the chuck-head, a bitsecured to. one end of said plates and projecting into a; lateralpassage within the head,.and a clamp asdescribed bearing upon thearc-shaped portion of the plates and adapted to press thesame with thebit, inward, when desired, during the-operation ofthechuck,substantiallyas described. 5. In-a device of ,the characterdescribed,

the combination, withvthe chuck-head, of plates loosely mounted thereonat opposite sides thereof, rear endportions of said platesarc-shapedincross-section and embracing the solid rear end ofthechuck-head,springs in termediate said arc-shaped portions of theplatesand the head, said arc-shaped portions tapered rearwardly, a bitsecured to one of the plates and projecting into a lateral pas ,sagewithin the chuck-head, a clamp inclosing and bearingupon: the taperedportion of the plates,and means for operating said clamp,

whereby the plates and thebit areforced inward as desiredduringtheoperation of the chuck, substantially asdescribed.

G. Ina device of thecharacter :described, the combination, withachuck-head having a socket or work-receiving recess and a solid rearportion, of plates arc-shaped in cross-section and loosely secured, atone end, to said chuck-head, enlarged tapered ends to .7 said platesadapted to in close thesolid portion of the chuck and forming a bearingfor a clamp, as described, mounted thereon, anda bit secured to one ofthe plates and projecting into alateral passage within the chuck-head,substantially as described.

7. In a device of. the character described,

the combinatiomwith achuck-head having arc-shaped plates loosely securedthereto at one end, springs between said plates and head,

and a bit secured toone of the plates, of a clamp bearingupon saidplates andcomprisin g an upper and a lower cross-piece, pivotedasdescribed, and means for. operatingsaid -cross-pieces toward eachother, substantially as and for the purpose described.

said cross-piece and mounted on the pulley, 10 for the purpose andsubstantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY MAYERS.

Witnesses:

W. HAMILTON, J AS. H. FAIRCLOTH.

